I was thinking about this concept while I was driving after dinner. You do not need a fancy $500 Monthly subscription for an edge.
Here is the Concept, You can build on this.
Notice how the Murrey Math Oscillator works in finding the pullbacks with a trend. Experiment & create your edge.
NOTE : EVERY PULLBACK TRADING SYSTEM WILL FACE TRANSITION ZONE, ITS UNAVOIDABLE. Transition Zone is when a Pullback translates into a Trend Change for those who don't know.
I will expand on this concept, If and when I find time to research.